The role of aluminum species in biphasic butene dimerization catalyzed by nickel complexes

Thiele, Daniel; Souza, Roberto Fernando de

doi:10.1016/j.molcata.2006.09.026

Cited by 31 publications

(26 citation statements)

References 27 publications

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“…De Souza has also reported the role of aluminum species for catalytic activity and selectivity of ethylene oligomerization in acidic ionic liquids. [30] A similar effect has already been observed for ethylene oligomerizations catalyzed by nickel complexes or ethylene polymerization [24] catalyzed by Cp 2 TiCl 2 immobilized in ionic liquid. [37] Ethylene Recycling Oligomerization…”

Section: Influence Of Oligomerization Temperaturesupporting

confidence: 66%

Biphasic oligomerization of ethylene with nickel complexes immobilized in organochloroaluminate ionic liquids

Pei

Liu

Gao

et al. 2009

Applied Organom Chemis

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Ethylene was selectively oligomerized by nickel complexes such as (PPh 3 ) 2 NiBr 2 and (PPh 3 ) 2 NiCl 2 immobilized in chloroaluminate ionic liquid in biphasic catalytic reactions. The influence of reaction parameters such as reaction media, reaction temperature and Et 2 AlCl : Ni molar ratio was also evaluated. Turnover frequency up to 24000 mol C 2 H 4 /(mol Ni h) was achieved under mild reaction conditions (0.5 atm and 40• C). GC-MS analyses showed that the obtained oligomers completely consist of C4 and C6. The olefinic products can be easily separated from the catalytic ionic liquid phase by simple decantation, and the nickel catalyst can be reused without a significant decrease in turnover frequency and change of the distribution of the olefinic products.

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Section: Influence Of Oligomerization Temperaturesupporting

confidence: 66%

Biphasic oligomerization of ethylene with nickel complexes immobilized in organochloroaluminate ionic liquids

Pei

Liu

Gao

et al. 2009

Applied Organom Chemis

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“…Therefore, the alkylaluminium compound is not only the activator, but also participates in the formation of chloroalkylaluminium anions, which influence the properties of the ionic liquid. Carlin and Wilkes [48] [49,50]. The reaction conditions depend, therefore, on the kind and amount of the chloroaluminates anions present.…”

Section: Polymerization Reactionmentioning

confidence: 99%

Effect of immobilization of titanocene catalyst in aralkyl imidazolium chloroaluminate media on performance of biphasic ethylene polymerization and polyethylene properties

2012

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], were applied as media of the Cp 2 TiCl 2 catalyst for biphasic ethylene polymerization. The studied aralkyl ionic liquids ensure greater stability of the catalyst at higher temperatures and more regular morphology of the produced polyethylene than analogous 1-n-alkyl-3-methylimidazolium chloroaluminates. The alkylaluminium compound participates in the termination reaction of the polymer chain. The catalyst is stable and enables recycling of the ionic liquid phase in the consecutive polymerization reactions. The [Ph-C 2 mim][AlCl 4 ] ionic liquid and AlEt 2 Cl alkylaluminium compound turned out to be the most suitable for the biphasic process. The influence of the kind of ionic liquid, alkylaluminium compound (AlEt 2 Cl and AlEtCl 2 ), activator/catalyst molar ratio, reaction temperature, reaction time and catalyst recycling on the polymerization performance as well as polyethylene properties such as molecular weight (M w ), polydispersity, melting temperature, crystallinity degree, bulk density and particle size is presented.

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“…The ionic liquid was reused for at least eight runs without loss of activity, thanks to which it exhibited industrial potential. Furthermore, the ionic liquid was stable during the reaction process [87].…”

Section: Scheme 20mentioning

confidence: 98%

Basic ionic liquids. A short review

Hajipour

Rafiee

2009

JICS

168

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Basic ionic liquids as environmental-friendly solvents and catalysts with high activity and selectivity and easily recovered materials were used to replace traditional bases such as KOH, NaOH, K 2 CO 3 , NaHCO 3 , NaOAc, triethylamine, or tetrabutylammonium acetate. Using the traditional bases generally suffered from disadvantages such as waste production, corrosion and environmental problems. Basic ionic liquids offering a new possibility for developing environmentally friendly basic catalysts due to the combination of the advantages of inorganic bases and ionic liquids. They are flexible, nonvolatile, noncorrosive, and immiscible with many organic solvents. Basic ionic liquids (BILs) have been used in base-catalyzed processes such as Michael addition, Markovnikov addition, Knoevenagel condensation, Henry reaction, Mannich reaction, oximation, FeistBenary reaction and etc. In this short review, we wish to present an overview of the types, properties, synthesis and applications of basic ionic liquids.

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The role of aluminum species in biphasic butene dimerization catalyzed by nickel complexes

Cited by 31 publications

References 27 publications

Biphasic oligomerization of ethylene with nickel complexes immobilized in organochloroaluminate ionic liquids

Biphasic oligomerization of ethylene with nickel complexes immobilized in organochloroaluminate ionic liquids

Effect of immobilization of titanocene catalyst in aralkyl imidazolium chloroaluminate media on performance of biphasic ethylene polymerization and polyethylene properties

Basic ionic liquids. A short review

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